I'm going by what I've experienced and heard by others. 1e and 2e psionics were rarely used. People found them strange and tended to leave it out of their fantasy. 3e, though, by making them more spellcaster like, got a lot of groups to allow them. I was able to play a lot more 3e psionic PCs and saw tons more in the various games that I played in, than I did in 1e and 2e games. I've seen many posters over the years echo that, and nobody say otherwise. It seems very highly unlikely that I'm wrong on this.